Most newbies like to use blockchain.info myself. I have used it in the past, when I started, to learn how to send and recieve BTC. After learning more about it, I realized that it's stupid to have any relevant amount of money in online wallets, so I run my own full node. You should put more effort into your security the more money you are holding in bitcoin. Remember to back up your private keys. There are endless videos nowadays on youtube, when I started it was just text.